October 1938: Poland annexed the Zaolzie region and parts of northern Slovakia from Czechoslovakia following the Munich Agreement

I have no incentive of whitewashing the threats and expansionism of other European countries post 1939. I just wish to highlight that Polish actions in 1938 weren't good either. Although they didn't sign the Munich agreement, they participated in the partition of Czechoslovakia after the Sudetenland episode. It was a widely unpopular action back then, [...]